Means for sizing and surface finishing paper tubes and the like



4 Sheets-Sheet l INVENTOR.

0149458 A. Dun LAP Jan. 5, 1954 c. K. DUNLAP MEANS FOR SIZING AND SURFACE FINISHING PAPER TUBES AND THE LIKE Filed March 21, 1950 Jan. 5, 1954 K DUNLAP C. MEANS FOR SIZING AND SURFACE FINISHING PAPER TUBES AND THE LIKE" Filed March 21, 1950 '4 Sheets-Sheet 2 IN V EN TOR.

(f/4i?! 5 K DUNLAP BY Jan. 1954 c. K. DUNLAP 2,664,793

' MEANS FOR SIZING AND SURFACE FINISHING PAPER TUBES AND THE LIKE Filed March 21, 1950 4 Sheets-Sheet s .zeo

IN VEN TOR. CHARLES K DU/VLAP 4 Sheets-Sheet 4 Jan. 5, 1954 c. K. DUNLAP MEANS FOR SIZING AND SURFACE FINISHI PAPER TUBES AND THE LIKE Filed March 21, 1950 Patented Jan. 5, 1954 roe si mo AND SURFACE FINISH: e were ti s ar no use Charles Dunlap, l lartsville, S. 0., assignor to Senoco P odu t fl a r a cor o ation o so Qt 9111 Application March 21, 1950, Serial No. 151,013

Ql- B e- This invention relates to amethod and means for sizing and surface finishing paper tubes and the like, and more (particularly to, such a method and means by which paper tubes or the like that 'havebeen treated with ather-mo-active resinous material may be vdimensionally sized and conditio-ned with a hard, slick, protective coating on their exterior surf-ace.

The present invention is especially well adapted for use in forming textile yarn carriers, and for convenience is described and illustrated. below principally in terms of its application for this purpose, although it is equally well adapted for use in any other instance where dimensional sizing and surface finishing of paper tubes or tubular bodies is desired.

Briefly de cr b d, the m thod of the pr sent nv nt on com e reatises paper tube r the l w th a emecti e esino ema e a hol i he t at d paperub inst-r tatio While mo in i on i ud nal th u h the b of e o a in in then trapp r-F ee th ap b di e t t he he o a eated eurne e end a owing i toxemia n his ei r e die for e eriod .e i ieient t eli e set les oi th sin u t t n ma ria in th surfac la ers of the paper tube.

Th a ara u ovid eeee dine e t esn ei en e ea ie o thi me deem prises essentially a reciprocating rnandrlel adapted for carrying the treated paper tube; .a first positioned stationary workeholding die coaxially aligned with this mandrel and having en t n d a et r r er ieneo e v i p ng the paper tube against rotation but allowing longitudinal novement thereof; a'second positi ne ro at n ing di h v a int na diamete roportione o d m e ie-nel s zin the paper tube; and a third positioned stationary urinee n o rat ns et nsm ans e m mi' fli ill it 31 7 de iredr clll ng temperature.

With the aopa a u a ransed t i man e the .r rnepsional iz n ens surfee fini hin o th pa e u is ee omr shed ith-ex t ona eff e ivene s b the ota n siz n whieh irons th aee ub vread l t h ir d mens al i and at t e Same t m cause the r s u i il'till materi l 1 flQWQnIll 2l2' trier u feee o h leaner tub so tha 2 ery Sliek e t v coatin .ievdeve e e l-r Conside able heat is generated during this act not vthe sizing die, and the curing die is accor nglyarranged to receive the paper tube directly from the sizing die so as to'prevent blistering'of the sized =tub e surf age. The curing die is arranged :for this purpose with aborehaving a length coextensive with the length of the paper tube being handled so; that the sized tube surface is entirely confined until any excessive heat has been dissipated and a desired curing temperature has been established for setting the resinous treating material.

The present invention is described further below in connection with the accompanying drawings, in which:

Fig. 1 is an elevation, partly in section, of a textile yarn carrier such as might be formed from paper tubing treated in accordance with he presen in n n;

Fig. 2 is a similar elevation illustrating the paper tubingafter dimensional sizing and surface finishing according to the present invention;

Fig. 3 is a sectional detail taken substantially O e-th in -3. in Fisie 4 i ame V ew a tly ia ram a o .a sizing and surface finishing apparatus embodying the present'invention;

.Fig. 5 is enlarged sectional detail further illustrating the arrangement of the sizing and surface finishing head; and

Fig. -.6 is a siinilar sectionaldetail illustrating a modified arrangement of the sizing and surface fin s in h ed- Referring now in detail to the drawings, the textile yarn carrier shown in Fig. 1 as an illustration of an a ticle that rnightbeformed from the paper tubing-treated in accordance withthe present,invntiomcornprises a conventional form of t ngtile bobbin having va tubular paper body or barrel ll}, oneend .of which is turned in to form a rounded tip portion ornose at [2, as is common practice, and which turned-mend may be formed with a terminal flange as at IA to provide a seat for identification disk.

A textile yarn carrier as shown in Fig. 1 may be formed accordance with thepresent invention from sized andsuriace finished paper tubing a is i lu trated nF en s- 2, t a er t n i iee ieate seneie by h e ence a e e '17 nd es ho eemerisee e wound larninated tubular paper body {6 having its exterior surface conditioned with a protective coating as atflB. wound laminated paper body I6, such as isillustrated Fig. -2, inay beforined bywinding a paper-blank convolutel'y upon itself to provide a laminated paper structure held together by adhesive applied to the paper blank before winding, although it'mig'ht be formed in other ways,'too, 'such as by spiral windihgQor a molded paper or fiber body might be used if desired. Also,- t hepaperbody [6 may be made up from any suitable paper or fiber-stock. In the case of textile yarn carriers, kraft stock is usually employed.

As previously mentioned, the protective coating I8 is developed on the exterior surface of the tubular paper body I6 after it has been treated with a suitable thermo-active resinous material, such as a Bakelite type resin. This resin treatment may be carried out effectively either by mixing the resin with the adhesive applied to the blanks before winding, if a wound laminated type of structure is to be used, or by dipping the fully formed tubular paper body I6 in the resin. 7

The apparatus for dimensionally sizing and surface finishing the paper tubing T to develop this protective coating I on the tubular paper body I6 after the resin treatment, is illustrated in Figs. 4 and of the drawing. As shown in Fig. 4, this apparatus comprises a suitable frame structure or supporting base I00 on which the previously mentioned reciprocating mandrel is disposed as at I02, the stationary work-holding die at I04, the rotating sizing die at I06, and the stationary curing die at I08.

The reciprocating mandrel I02 is mounted to extend from a crosshead IIO which is arranged for sliding movement on guide rods H2 carried on the frame structure I00 by suitable support brackets as at I I4 and H6. The crosshead H0 is moved on the guide rods II2 to reciprocate the mandrel I02 by means of an hydraulic actuating system comprising a pressure cylinder II8 from which a piston rod I20 extends to the crosshead H0. The crosshead H0 is formedwith a laterally extending arm portion I22 disposed for contact with adjustable limit stops I24 and I26 to regulate the reciprocating stroke of the mandrel I 02, the limit stops I24 and I26 being carried on an operating bar I28 arranged to actuate a conventional spring-loaded reversing mechanism I30 provided for automatically operating a control valve I32 through which the hydraulic actuating system is controlled to obtain the desired reciprocating motion of the crosshead H0 and the mandrel I 02. Pressure lines I34, I36, I38 and I40 and a reservoir I42 are arranged in the usual manner to complete this hydraulic system.

The arrangement of the sizing and surface finishing head, comprising the work-holding die I04, the rotating sizing die I06, and the curing die I08, is shown more in detail in Fig. 5 of the drawing. The stationary work-holding die I04, which is positioned first in relation to the working stroke of the mandrel I02, is mounted as at I44 on a support bracket I 46 carried on the frame structure I00.

I48 of this work-holding die I04 is proportioned for gripping the paper tubing T against rotation while allowing it to be moved longitudinally by the mandrel I02.

The rotating sizing die I06 is disposed immedi- I54 and I56 properly in relation to a spacing sleeve I62 carried on the tubular member I52. This spacing sleeve I62 also supports a sprocket wheel I64 which, together with the spacing sleeve I62, is secured to the tubular member I52 as by a set screw at I66, and which is adapted to be As previously mentioned, the bore driven by a sprocket chain drive I68 from an electric motor or the like I10 (compare Fig. 4) for rotating the sizing die I06. The bore I12 of the rotating sizing die I06 is proportioned in accordance with the desired finished size for the tubing T.

The curing die I08 is in turn disposed immediately beyond the rotating sizing die I66, being mounted in this position as at I14 on the previously mentioned support bracket II6, which also supports the guide rods I I2 at one end. Like the work-holding die I04, the bore I16 of the curing die I08 is proportioned for gripping the paper tubing T against rotation, and is formed in a length coextensive with the length of the paper tubing T being handled. This curing die I08 also incorporates heating means, preferably electrical means as indicated in Figs. 4 and 5 at I18, for maintaining it at a desired curing temperature.

In operation, the dimensional sizing and surface finishing of the paper tubing '1 is carried out with the apparatus illustrated in Figs. 4 and 5 by placing a length of the paper tubing T, after treating with a resinous material as noted above, on the mandrel I02 at the beginning of its forward or working stroke. The mandrel I02, is, of course, proportioned in accordance with the length of the paper tubing T to be handled, and it will be noted that the mandrel I02 is shouldered, as at I80, to provide a seat for the paper tubing T as the mandrel I02 forces it longitudinally through the sizing and surface finishing head.

As the mandrel I02 with a length of paper tubing T in place is moved forward on its working stroke, theleading end of the paper tubing T enters and moves longitudinally through the first positioned work-holding die I04 which, as previously mentioned, is proportioned to allow this longitudinal movement but which grips the paper tubing T against rotation so that as it is moved forward by the mandrel I02 to reach the rotating sizing die I06, it is held securely from rotation while the sizing and surface finishing is effected by the action of this die I06. The action of the rotating sizing die I06 consists essentially of an ironing effect which lays the surface of the paper tubing T smooth and reduces it to the desired size, and which effect is accompanied by the generation of considerable heat which causes the resinous material contained in the paper tubing T to flow and form a smooth, slick, protective coating on the exterior surface of the paper tubing T in a particularly effective manner.

As the mandrel I02 moves further to carry the paper tubing T progressively through the rotating sizing die I06, the paper tubing T is received immediately in the bore I16 of the curing die I00, so that it remains confined until the heat generated by the sizing operation is dissipated so as to avoid any tendency of the exterior surface of the paper tubing T to blister as a result of this heating. Also, as the bore I16 of the curing die I03 is proportioned as in the work-holding die I04 for gripping the paper tubing T against rotation, the trailing end of the length of paper tubing T being handled will be properly held in the rotating sizing die I06 even after it passes beyond the work-holding die I04.

The entrance edge of the bore I16 of the curing die I08 is relieved as at I 02 to allow the paper tubing T to be received readily from the sizing die I06, while the bore I12 of the sizing die I06 is formed to open in the rear face of the sizing reater 5, diet- 0.6 wit -asquare edge aset 41B tend there y form an lov ins fr m moved into the curing die H18, 1 and the ,mandrel H32. sta s to wit draw o its r turn rok The paper tub ng T is time l t. n th -curing die- I Ila-un il a succe din l ngth of -pare tubin T has been placed o he and e M for a new yc e f perati n and t s succe ing, lengt of paper tubing T has beentmovedthrough the sizing and su f e finishing head by the m ndr I02 to d pla the first le gth of pa er tubin I..fromthe cu ng dielilB- By adjustin the cycle of operation, and-regulating the heat ing means H8 at the curing die H18, a proper curing period may be allowed for setting the resinous material in the outer layers of v the paper tubing :so that each length of the tubing T emerges from the curing dienot only dimensionally. sized but .alsowith a hard, 'slick, .-prot.e.ctive1y i oated exterior surf-ace which-has .e1-: 11 o y sical properties.

The appa atus des rib d abov o carryin out this sizin and surface finish n e ation may be arrang d a ternatively, if d si w h a plurality of otatingsizing d e m unt d oaxia ly succession between the work-holding die M and the cur n di 1 08 r the ha w th just he s ng as zin die l 05- W e thi i o the sizingidies shouldieach be rotated in a directioniopposite to an ad acent sizing die, and the bores of the sizing diesshould decrease-successivelyin diameter. With the apparatus arranged, in this manner, the sizingaction canbe efiected both more adua ly an to a eater xtent, and this, as wellfas th suc e pposits dir tio s o rotation of. the in d es, makes v tmuch. easier o handle tu l r b d e which are difiicult to grip against rotation durins s z n I claim:

1. A machine for dimensionally sizing and. developinga hard, slick, protective coating on-the exterior surface of a resin coated tubular paper hody,,said;machin e comprisingat least one sizing d -m unted for rotat on a st i y curin d mounted in coaxial alignment with said sizing di m n formovin s id resi coa ed ubula paper ody-th u h sa iz ad and in isaid curin the means for rotatin said sizin :di

n me ns f r maintainin 1 53 6 cu in die-at a desired curing temperature.

2. A-machine for dimensionally sizing and developing a hard, slick, protective coating on the exterior surface of a resin coated tubular paper b y, d-machin ompr inati om n, a first positioned stationary work-holding die proportioned in diameter for gripping said resin coat abular pap y asa nst tationwh l allowing longitudinal movementthereohasecond posi on d siz n i m nted "for ation c9- aziallywithrespect to said workeholding die,,a third positioned stationary curing die 1 disposed in coaxi lalienm n w h idsizi ie-mean for ov ng sa d resin oatedtiibiilar body lone tudinally t ugh said workeh d -d e and said sizing die and into said curing dieinysuccession, drive means for rotating sizing die, and heating means for maintaining said curing die at a desired curing temperature.

3. A machine for dimensionally sizing and developing a hard, slick, protective coating on the exterior surface of a resin coated tubular paper body, said machine comprising a stationary work-holding die, at least one rotatable sizing posed:with spe t-t each th success onafor'icrmii ea i; t Q W yl a p a wa through brai -resin seated tubular paper bodyzmay be moved leneitudina lr a d -r ro ab e mand ekier-mo ins said res n tedu ular re per b y ona tudinal y th ough said :di s aid work-hold n die and said car n di e n p pQr-t 0ne.d d amete ior r ppine said r sin coa ed in-er paper body against rotation-but allowi g lone eitudina mo ment the o "fo imens ona si ins a d su fac developm n b aid i-retat h siz n die- A- emach neas d fi ed in-claim 3 andfu th char cterized i that lura t o r a ng zing dies ,aremounted coax-ially in succession ,be-. tween said work-holding die and said curing die, said'sizing dies each being rotated in ,a di rection opposite to an adjacent sizing ,die, and thefbores of said sizing dies successively decreasins i diameter.

;5. Amachine ford mensiona l s zineandsu e fin hi a pape tu ha ha bee tre ted. with a thermo-active resinous material, said machin comp i g in mb na n a w supporting mandrel mounted for reciproca nd adap ed-tor ca ryin said t eate m e t ibe, and, coaxially aligned within the stroke of Said mendt h a sta o a -.wor ,o.1dine d rrono tionedin' di m er r g p n ai t ea ed pape tube but allowing longitudinal movement there,- of,;a rotatable sizing die, anda stationary cur e di an for re cati g aid mand el.

means-for rotating :saidsizing d efan rm an o a ntainin sa d curin die ate de ired urin em e atur A, ma h ne i rd mensi na ly s zinsandsii face finishin l inated pape tubes thathave been tr ted it a them. a e resinous ma: teria1,:sa d machine comprisin i comb non a stat ona y wor -hold n (.11 ha in a ma nal diameter adaptediw grippin saidat eat r aner tubes a ain t rotat on but all win lon i u ina movem of said ubes th ret roueh-aro tabl sizin ie. s o e c xi lly es c to sai workholding die for receiving therefrom treated paper tubes moved longitudinally therethrough, and a station y curing d e d sp sed eaxia l with resp c t said siz n ie r re i n the rom sa d trea ed paper t es a er-sinner a d c r ng die als ha ing an in nal di m er adapted formripping said treatedpaper tubes gainst otat on but a l win longi al m men -thereof me n r mo in said. treated. pe per tubes lon itud na t ou sa d kzh v inaand, sizi 'die and intosaid cu n die fcrmtatine said s zi i and eat n means formainta ing sa d c ring die at a desir d ur.- inetcm rature- ,A. mach n ,io dimensi nallysiz n and s r face finishing a pape tubeth thes been invested with a su face coa ing o ,a thermo aet ve r sin, saidma h ne cQrnprisinearst positioned wo k-5 holdin od asaid-wo ke oldin .die having n in ternal iam terdapted fo g i pin sa d treated. paper tube but allowing longitudinalmovement thereof, a second positioned rotating sizing die coaxially disposed with respect to said work-holding die, a third positioned stationary curing die coaxially disposed with respect to said sizing die, said curing die also having an internal diameter adapted. for gripping said treated paper tube against rotation but allowing longitudinal movement thereof, and having a length coextensive with said treated paper tube whereby it is adapted for preventing blistering of th tube surface following sizing, means for moving said treated paper tube longitudinally through said dies in succession, and heating means for maintaining said curing die at a desired curing temperature.

8. In a machine for dimensionally Sizing and surface finishing a paper tube that has been treated with a thermo-active resinous material wherein the treated paper tube is supported on a reciprocating mandrel and is moved by said mandrel longitudinally through a rotating sizing die to smooth the surface and size the tube to the desired outside diameter, the improved means for dimensionally sizing and surfac finishing the treated paper tube which comprises a first positioned stationary work-holding die having an internal diameter adapted for preventing rotation of an unsized paper tube being moved longitudinally therethrough, said die being supported in coaxial alignment with said reciprocating mandrel, a second positioned rotating sizing die disposed coaxially with respect to said work-holding die, and a third positioned curing di disposed coaxially with respect to said sizing die and incorporating heating means for maintaining it at a desired curing temperature.

9. A machine for dimensionally sizing and surface finishing a paper tube that has been treated with a thermo-active resinous material, said machine comprising a reciprocating mandrel adapted for carrying said treated paper tube, a first positioned stationary work-holding die coaxially aligned with said mandrel and having an internal diameter proportioned for gripping said treated paper tube against rotation but allowing longitudinal movement thereof, a second positioned rotating sizing die, a third positioned stationary curing die incorporating heating means, said sizing die and said curing die both being likewise coaxially aligned with said mandrel, and means for reciprocating said mandrel for moving said treated paper tube through said Work-holding and sizing dies and into said curing die.

10. A machine for dimensionally sizing and surface finishing a paper tube that has'been treated with a thermo-active resinou material, said machine comprising a mandrel mounted for reciprocation and adapted for carrying said treated paper tube, a stationary work-holding die, a rotating sizing die, and a stationary curing die coaxially disposed with respect to said mandrel and mounted in succession for forming a substantially continuous bore through which said treated paper tube may be moved longitudinally by said mandrel, and means for reciprocating said mandrel for moving a treated paper tube longitudinally through said work-holding and sizing dies and into said curing die, the bore of said sizing die being formed to open in the rear face of said die with a square edge, and the entrance edge of the bore of said curing die being relieved whereby the rear face of said sizing die forms an abutment for stripping said treated paper tube from said reciprocating mandrel after the tube has been moved into said curing die by the mandrel.

11. A machine for dimensionally sizing and surface finishing a paper tube that has been treated with a thermo-active resinous material, said machine comprising a frame structure, slide bars mounted on said frame structure, a crosshead disposed for reciprocation on said slide bars, a mandrel supported on said crosshead and adapted for carrying said treated paper tube, a stationary work-holding die, a rotating sizing die, and a stationary curing die, all of said dies being mounted on said frame structure coaxially in relation to said mandrel and being disposed in succession for forming a substantiall continuous cylindrical passage-way through which said treated paper tube may be moved longitudinally by said mandrel, means carried by said frame structure for reciprocating said mandrel and thereby move said treated paper tube longitudinally through said work-holding and sizing dies and into said curing die, means for rotating said sizing die, and means for maintaining said curing die at a desired curing temperature, said work-holding and sizing dies both having a bore shorter than the length of said treated paper tube, the bore of said work-holding die having an internal diameter proportioned for gripping said treated paper tube against rotation during sizing by said rotating sizing die but allowing longitudinal movement of said treated paper tube, the bore of said sizing die being formed to open in the rear face of said die with a square edge, and the entrance edge of the bore of said curing die being relieved whereby the rear face of said sizing die forms an abutment for stripping said treated paper tube from said reciprocating mandrel after the tube has been moved into said curing die by the mandrel, and said curing die also having an internal bore diameter adapted for gripping said treated paper tube against rotation but allowing longitudinal movement thereof, and having a length coextensive with said treated paper tube whereby said curing die is adapted for preventing blistering of the tube surface following sizing.

12. A machine as defined in claim 11 and further characterized in that a tubular member is mounted for rotation on said frame structure in spaced relation concentrically over said workholding die, and said sizing die is mounted at the rear end of said tubular member and thereby disposed for rotation adjacent the rear face of said work-holding die.

CHARLES K. DUNLAP.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 887,809 Hurd May 19, 1908 1,019,406 Baekeland Mar. 5, 1912 1,595,811 Anderson Aug. 10, 1926 2,296,781 Farney Sept. 22, 1942 2,343,096 Stahl Feb. 29, 1944 2,411,542 Ilch Nov. 26, 1946 2,457,504 Snoke Dec. 28, 1948 2,509,715 Allen et al. May 30, 1950 2,528,152 Landgraf Oct. 31, 1950 2,528,168 Paulson Oct. 32, 1950 

